CN115243954A

CN115243954A - Seat device

Info

Publication number: CN115243954A
Application number: CN202080097696.8A
Authority: CN
Inventors: 中根正伸; 海老名俊也; 长尾裕
Original assignee: Koito Electric IndustriesLtd
Current assignee: Koito Electric IndustriesLtd
Priority date: 2020-02-28
Filing date: 2020-09-16
Publication date: 2022-10-25
Also published as: WO2021171667A1; JP2021133183A; US12024070B2; US20230147877A1; JP7062710B2

Abstract

Provided is a seat device capable of reliably preventing a seat occupant from rotating when a seat back surface is in an extended state along a wall. The disclosed device is provided with: a rotation lock mechanism (60) capable of restricting the rotation of the seat (1); a rotation operation part (200) for releasing the restraint by the rotation locking mechanism (60); and a rotation operation preventing mechanism (210) which can not perform the releasing operation of the rotation operation part (200) when the seat (1) is in the extension state. The rotation operation preventing mechanism (210) is provided with: an engaging part (211) provided on the base (11); and an engaged part (207) which is provided on the mobile station (20) and engages with the engaging part (211) when the seat (1) is in the extended state, thereby preventing the release operation of the rotation operation part (200).

Description

Seat device

Technical Field

The present invention relates to a seat device capable of changing a state of a seat.

Background

Conventionally, for example, a seat mounted on a railway vehicle is of a type of a chair which is long in both side directions and on which a plurality of persons sit, and is generally provided along a wall in a passenger compartment. As such a seat, the following rotary seats are known: the seat can be rotated about a rotation axis at the center of the seat to change the direction to an extended state in which the seat back surface is parallel to the wall and a crossed state in which the seat back surface is orthogonal to the wall.

In such a swivel seat, the following seat device is proposed: the seat is provided with a slide mechanism in addition to a rotation mechanism provided with the seat, and a transmission mechanism for interlocking the mechanisms so that when the seat is rotated from an extended state along the wall to a crossed state, the trajectory (rotation radius) of the seat does not interfere with the wall. For example, refer to patent document 1.

That is, in the swivel seat, in order to obtain a comfortable space by expanding the passage width between the seats on both sides as much as possible in the passenger compartment, the swivel shaft of the seat is positioned near the wall in the extended state, and the swivel shaft of the seat is slid toward the passage side so that the seat does not interfere with the wall in the crossed state. Therefore, in the swivel seat, it is necessary to restrict the rotation of the seat by the operation of the seated person in order to prevent interference with the wall in the extended state.

Here, as a lock mechanism for restricting the rotation of the seat, a lock pin is generally configured to move from a fixed side of the seat toward the seat. In this lock mechanism, as a structure for preventing the occupant from performing the unlocking operation only in the extended state, it is not sufficient to simply store the pedal for performing the unlocking operation (see paragraph 0062 of patent document 1). Therefore, the following techniques are known: for example, in a stroke of the lock pin from the lock position to the lock release position, a difference is provided between the electric operation and the manual operation (see paragraph 0053 of patent document 2).

Documents of the prior art

Patent literature

Patent document 1: patent No. 3431772

Patent document 2: japanese patent laid-open publication No. 2018-016217

Disclosure of Invention

However, in the conventional swivel device, in the lock mechanism for restricting the swivel of the seat, the number of components is large and the structure is complicated in order to prevent the unlocking operation of the seat occupant only in the extended state, and it is desired to further reduce the cost, and the precision adjustment between the components is troublesome, and there is a possibility that a malfunction occurs.

The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a seat device that can reliably prevent a seat occupant from rotating the seat when the seat is in a specific state (extended state) without increasing the cost with a simple configuration.

In order to achieve the above object, one aspect of the present invention is a seat device that can change a state of a seat, the seat device being rotatable about a rotation axis, the seat device including:

a rotation lock mechanism capable of restraining the seat at a plurality of rotation angles;

a rotation operation unit that performs a releasing operation of the restraint by the rotation lock mechanism; and

a rotation operation preventing mechanism which can not perform the releasing operation of the rotation operation part when the seat is in a specific state of a rotation angle,

the rotation operation preventing mechanism includes:

an engaging portion provided on a fixed side of the seat; and

and an engaged portion provided on the movable side of the seat and engaged with the engagement portion when the seat is in the specific state, whereby the release operation of the rotation operation portion is disabled.

According to the seat device of the present invention, in the case where the state of the seat can be changed, the cost is not increased by a simple structure, and when the seat is in a specific state, the rotation operation of the seat can be reliably prevented.

Drawings

Fig. 1 shows a crossing state of a seat device according to an embodiment of the present invention, (a) is a perspective view of the entire seat, (b) is an enlarged perspective view of a reclining operation unit, and (c) is an enlarged perspective view of a swiveling operation unit.

Fig. 2 shows an extended state of the seat device according to the embodiment of the present invention, (a) is a perspective view of the entire seat, (b) is an enlarged perspective view of the reclining operation portion, and (c) is an enlarged perspective view of the swiveling operation portion.

Fig. 3 is a perspective view showing an internal structure of a seat device according to an embodiment of the present invention.

Fig. 4 is a front view showing a crossing state of the seat device according to the embodiment of the present invention.

Fig. 5 is a side view showing an extended state of the seat device according to the embodiment of the present invention.

Fig. 6 is a perspective view showing a base, a moving stage, and a bottom frame of a seat device according to an embodiment of the present invention.

Fig. 7 is a side view showing an initial position of a reclining operation portion of a seat device according to an embodiment of the present invention.

Fig. 8 is a side view showing an operation position of a reclining operation portion of a seat device according to an embodiment of the present invention.

Fig. 9 is a side view showing initial positions of respective members of a reclining unit of a seat device according to an embodiment of the present invention.

Fig. 10 is a side view showing a state in which the initial positions of the respective members of the reclining unit of the seat device according to the embodiment of the present invention are restrained from being operated.

Fig. 11 is a side view showing a state in which a rotation operation portion of a seat device according to an embodiment of the present invention is not restrained by a rotation operation preventing mechanism from being inoperable.

Fig. 12 is a side view showing a state in which a rotation operation portion of a seat device according to an embodiment of the present invention is restrained by a rotation operation preventing mechanism from being inoperable.

Fig. 13 is a perspective view showing a rotation lock mechanism of a seat device according to an embodiment of the present invention.

Fig. 14 is a perspective view showing a state where the rotation lock mechanism of the seat device according to the embodiment of the present invention is viewed from the lower side.

Fig. 15 is an explanatory diagram showing a process of changing the seat to the extended state, the — crossed state, and the inverted crossed state in the seat device according to the embodiment of the present invention.

Detailed Description

Hereinafter, embodiments representing the present invention will be described based on the drawings.

Fig. 1 to 15 show an embodiment of the present invention.

The seat device 10 of the present embodiment can change the state of the seat 1. Here, the state of the seat 1 includes not only the direction of rotation of the seat 1 but also a concept such as a change in the front-rear position of the seat 1. The type of the seat 1 is not particularly limited, and a case where the seat is applied to a two-seat chair mounted in a passenger compartment of a railway vehicle will be described below as an example. Note that, in each drawing, some of the shapes of the same portion are merely design changes (for example, the shapes of the bottom frame 30 in fig. 1 and 6 are different).

< brief summary of seat device 10 >

As shown in fig. 6, the seat device 10 includes: a base 11 fixed on the floor surface; a movable stage 20 supported by the base 11 to be movable forward and backward; and a bottom frame 30 supported rotatably in the forward and backward directions on the seat 1 of the moving base 20. Here, the base 11 is a "fixed side of the seat 1", and the movable table 20 and the base frame 30 are a "movable side of the seat 1". The seat device 10 is disposed on a floor surface on the side of a wall (window) in the passenger compartment of the railway vehicle, and "a" in fig. 6 is a part of the wall parallel to the traveling direction of the railway vehicle.

In the seat device 10, the base frame 30 of the seat 1 is supported on the movable stage 20 via the rotating mechanism 40 so as to be rotatable about the rotation axis. The movable stage 20 is supported on the base 11 via the slide mechanism 14 so as to be able to advance and retreat together with the rotation mechanism 40. Although not shown, the seat device 10 includes an interlocking mechanism for interlocking the advance and retreat of the seat 1 by the slide mechanism 14 and the rotation of the seat 1 by the rotation mechanism 40.

< about seat 1 >

As shown in fig. 1, a seat 1 is provided with two seat portions 2 and a backrest 3 side by side in both side directions, as a chair for two-person seating, for example. A pair of sleeve portions 4 covering the seat portion 2 from the side are provided on both sides of the seat 1. The upper end side of each sleeve 4 is formed as an armrest 5 extending substantially horizontally in the front-rear direction. The lower end side of the backrest 3 is supported to be tiltable on the rear end side of the seat 2 via a reclining mechanism 50 (see fig. 3).

< tilting mechanism 50 >

As shown in fig. 3, the reclining mechanism 50 tiltably supports the backrest 3 in a predetermined angle range with respect to the seat 2. The tilt mechanism 50 includes a damper 51 such as a gas spring. The damper 51 is configured such that a piston rod 53 is insertable into and retractable from the cylinder body 52, and is disposed in parallel with the front-rear direction on the bottom frame 30. The damper 51 is biased in a direction in which the piston rod 53 is accommodated in the cylinder body 52, but the piston rod 53 can be fixed in a state of protruding by an arbitrary amount.

The rear end of the cylinder body 52 is connected to the lower end of the frame 3a inside the backrest 3 so as to be able to push and pull. On the other hand, the tip of the rod 53 protruding from and retracting from the tip of the cylinder body 52 is connected to an appropriate portion on the tip side of the bottom frame 30. By the damper 51, the backrest 3 can be maintained at an arbitrary reclining angle. That is, when the damper 51 is in the locked state, the piston rod 53 is fixed in a state of protruding from the cylinder body 52 by a predetermined amount, and the backrest 3 can be held at an arbitrary tilt angle.

When the damper 51 is unlocked, the backrest 3 is returned to the initial position of the highest position by the biasing force of the piston rod 53 accommodated in the cylinder body 52. In this unlocked state, the seated person can press the backrest 3 rearward against the restoring force of the damper 51, thereby adjusting the backrest 3 to an arbitrary reclining angle.

The lock mechanism of the damper 51 is a general lock mechanism, and therefore, a detailed description thereof is omitted, but a release button 54 for releasing the lock state is provided near the piston rod 53. A tilt operation portion 100 for releasing the locked state by pressing the release button 54 is provided at the front end of the armrest 5. The tilt operation unit 100 corresponds to an "operation unit" of the present invention.

< tilting operation part 100 >

As shown in fig. 1, the tilt operation unit 100 is assembled and unitized in one housing 101 and is assembled inside the front end of the armrest 5. The reclining operation portion 100 is used to perform an operation (reclining operation) of tilting the backrest 3 by the reclining mechanism 50.

As shown in fig. 9 and 10, the rotation operating unit 100 includes an operating lever 104, and the operating lever 104 is swingably supported by a support bracket 102 fixed to the housing 101 via a pivot 103. The upper end side of the operating lever 104 is swingable in the front-rear direction about the pivot shaft 103 supported by the shaft as a swing center. The operating lever 104 swings between an initial position (see fig. 7) where the lower end side is housed in the housing 101 and an operating position (see fig. 8) where the lower end side is pulled out forward.

A receiving member 105 of a tilt operation lock mechanism 110 to be described later is fixed to the back side of the operating lever 104. One end of a tilt operation cable 106 extending to the release button 54 is connected to the receiving member 105. Here, the operating lever 104 is pulled forward to the operating position, and the link on the release button 54 side is pulled via the tilt operating cable 106 to press the release button 54, thereby releasing the damper 51 from the locked state. The operating lever 104 is normally biased at an initial position where it is stored to the rear via the tilt operating cable 106.

< Tilt operation locking mechanism 110 >

The tilt operation portion 100 is provided with a tilt operation lock mechanism 110, and the tilt operation lock mechanism 110 restrains the tilt operation portion 100 from being operated. When the seat 1 is in an extended state (specific state) described later, the reclining lock mechanism 110 restricts the reclining portion 100 to be inoperable. Further, the tilt operation lock mechanism 110 corresponds to the "lock mechanism" of the present invention.

As shown in fig. 9, the reclining lock mechanism 110 includes a substantially L-shaped link 112 supported to the housing 101 via a pivot 111 so as to be swingable in the front-rear direction. A lock pin 113 is supported by the link 112 at one end side of the pivot 111 so as to be upwardly directed and swingable. The lock pin 113 is disposed such that its upper end side penetrates the guide hole 102a of the support bracket 102 and vertically protrudes and retracts in accordance with the swing of the link 112.

In the receiving member 105 located on the back side of the operating lever 104, a lock hole 105a into which the tip end of the lock pin 113 can be fitted is provided in a lower portion where the lock pin 113 faces when the operating lever 104 is at the initial position. Here, the link 112 that operates the lock pin 113 is urged by the spring member 114 in a clockwise direction about the pivot 111 in fig. 9 so that the lock pin 113 is normally in a state of being disengaged from the lock hole 105a of the receiving member 105.

One end side of a tilt lock cable 115 is connected to the link 112 via a connector 116 on the other end side of the pivot 111. The other end side of the tilt lock cable 115 extends to a rotation operation portion 200 side to be described later. When the seat 1 is in a specific state (an extended state described later), the reclining lock cable 115 is pulled from the side of the rotational operation portion 200, and the reclining operation portion 100 is restrained from being operated.

That is, the tilt lock cable 115 swings the link 112 counterclockwise about the pivot 111 in fig. 9 and 10 against the urging force of the spring member 114. Thus, the lock pin 113 is fitted into the lock hole 105a of the receiving member 105, and the operation lever 104 is restrained so as not to be operable. Further, the tilt lock cable 115 corresponds to a "transmission member" of the present invention.

As shown in fig. 7 and 8, the components of the tilt operation lock mechanism 110 disposed in the housing 101 are covered with a lid 101a in the shape of a hood. The housing 101 and the cover 101a are formed with circular arc-shaped guide grooves 101b centered on the pivot 111 of the link 112. A pivot shaft 117 that pivotally supports the connector 116 at the other end of the link 112 is movably fitted in the guide groove 101b, and a swing range around the pivot shaft 111 of the link 112 is limited.

< orientation with respect to seat 1 >

The seat device 10 can convert the state of the seat 1 into an extended state (see fig. 6 and 2) in which the seat back surface is substantially parallel to the wall a and a crossed state (see fig. 1) in which the seat back surface is substantially perpendicular to the wall a. Here, the crossing state includes a negative crossing state (see fig. 1) and a reverse crossing state which is 180 degrees reverse to the negative crossing state. As shown in fig. 15, when the rotation angle is 0 ° with the extended state of the seat 1 as the home position, the rotation angle in the cross state is 90 °, and the rotation angle in the reverse cross state is-90 °. The seat back surface is synonymous with the back surface of the backrest 3. Hereinafter, the crossover state and the reverse crossover state are collectively referred to as a crossover state.

< base 11 >

As shown in fig. 6, the base 11 is fixed to the floor surface beside the wall a in the passenger compartment. The chassis 11 is formed by combining frame members in a frame shape elongated in a direction (front-rear direction) substantially orthogonal to the wall a. The upper surface side of the base 11 is substantially horizontal, and is surrounded by both

side end portions

12 and 12 constituting long sides and a rear end portion constituting a short side of a rear side (wall a side), but a front side (tunnel side) is opened.

The base 11 is disposed so that its rear end portion approaches substantially parallel to the wall a, and both

side end portions

12, 12 face the passage side substantially perpendicularly to the wall a. Further, on the upper surface side of the base 11, in addition to the slide mechanism 14 described later, related members such as a stopper for restricting the forward/backward range and the rotational direction of the base frame 30 are provided.

< sliding mechanism 14 >

As shown in fig. 6, a movable stage 20 is attached to the upper surface side of the base 11 via a slide mechanism 14 so as to be able to advance and retreat in a direction substantially perpendicular to the wall a. The slide mechanism 14 includes a pair of

guide rails

14a, 14a provided inside the both

side end portions

12, 12 of the base 11. The pair of

guide rails

14a, 14a are opposed to each other in parallel along both long sides of the upper surface side of the base 11, and both side portions 21, 21 of a moving table 20 described later are slidably fitted to the inner sides of the guide rails 14a as they are.

< mobile station 20 >

As shown in fig. 6, the movable stage 20 is disposed substantially horizontally on the upper surface side of the base 11, and is configured by combining frame members in a rectangular frame group shape. Both side ends 21, 21 constituting the long side of the moving stage 20 are slidably fitted inside the pair of

guide rails

14a, 14a. Thus, the mobile station 20 slides so as to be able to advance or retreat in a direction substantially orthogonal to the wall a. A rotation mechanism 40 for rotating the seat 1 about a rotation axis is provided substantially at the center of the moving base 20.

< rotating mechanism 40 >

The rotation mechanism 40 supports the base frame 30 of the seat 1 on the movable stage 20 so as to be rotatable in the forward and backward directions on a substantially horizontal plane. The rotation mechanism 40 is configured as a unit in which a pair of inner and outer annular rotary disks are combined rotatably with each other with a bearing or the like interposed therebetween, for example. In the rotating mechanism 40, the outer rotary plate is fixed to the movable stage 20, and the inner rotary plate is fixed to the base frame 30.

The rotation axis which is the rotation center of the seat 1 is the center line of the rotation mechanism 40, and is not physically configured in the present embodiment. As shown in fig. 4, the rotation mechanism 40 includes a motor 41 as a power source. The motor 41 is provided with a reduction gear, and a drive gear on an output shaft thereof is rotatably engaged with a sprocket 42 centered on a rotation shaft provided on the base frame 30 side. The seat can also be rotated manually by the rotating mechanism 40.

< bottom frame 30 >

As shown in fig. 6, the base frame 30 is mounted to the seat 1 and supported by the rotating mechanism 40 on the moving stage 20. The bottom frame 30 is made of, for example, a metal plate conforming to the bottom surface of the seat 2. A sprocket 42 is integrally provided on the lower surface side of the base frame 30, and the sprocket 42 is rotatably engaged with the drive gear of the motor 41.

< linkage mechanism >

The seat device 10 is provided with an interlocking mechanism (not shown) for interlocking rotation and forward and backward movement of the seat 1 so that the seat 1 does not interfere with the wall a when the seat 1 is changed to the extended state, the cross state, or the reverse cross state.

When the seat 1 is rotated together with the base frame 30, the interlocking mechanism converts the rotation of the base frame 30 into a linear motion and transmits the linear motion to the movable stage 20, and moves the movable stage 20 together with the base frame 30 in a linear direction so as to approach or separate from the wall a. The type of the interlocking mechanism is not particularly limited, but specifically, for example, an invention described in japanese patent application laid-open No. 2018-187971, which has been filed by the present applicant, or an invention proposed in japanese patent application laid-open No. 2019-239066, which has not been disclosed, is preferably used.

< rotational locking mechanism 60 >

The seat device 10 includes a rotation lock mechanism 60, and the rotation lock mechanism 60 restricts the base frame 30 (seat) from rotating at each rotation position of the extended state, the — crossed state, and the reverse-crossed state. The rotation lock mechanism 60 locks the base frame 30 to be non-rotatable with respect to the base frame 11, and therefore the mobile station 20 is also inevitably restricted to be non-movable with respect to the base frame 11.

As shown in fig. 6, the rotation lock mechanism 60 includes: a locking pin 61 which can be vertically moved from the base 11 side to the bottom frame 30; and locking

holes

62a, 62b, 62c provided in the bottom frame 30 and through which the locking pins 61 are engaged and disengaged. The locking holes 62a, 62b, and 62c are provided in total three on one long side along the seat back surface and two short sides along both sides of the seat in the substantially rectangular bottom frame 30.

The lock pin 61 is assembled to the unit 60a, and the unit 60a is fixed to the rear end of the upper surface side of the base 11. The lock pin 61 is capable of moving upward and downward from the upper surface side of the base 11, and is operable at a lock position where it protrudes upward and fits into the locking

holes

62a, 62b, and 62c, and a lock release position where it sinks downward and disengages from the locking

holes

62a, 62b, and 62c.

When the seat 1 is changed to the extended state, the cross state, or the inverted cross state, the lock pin 61 is fitted into the locking

holes

62a, 62b, and 62c on the side of the bottom frame 30, which are vertically aligned at each position, and thereby the seat 1 is restrained from rotation. That is, in the extended state, the lock pin 61 is fitted into the locking hole 62a located on one long side of the bottom frame 30. In the cross state, the lock pin 61 is inserted into and engaged with the locking hole 62b located on one short side of the bottom frame 30. In the reverse crossing state, the lock pin 61 is fitted into the locking hole 62c located on the other short side of the bottom frame 30.

As shown in fig. 13 and 14, the unit 60a in which the lock pin 61 is incorporated is provided with a spring member (not shown) that constantly biases the lock pin 61 toward the lock position by projecting the lock pin 61 upward, and a link 60b that sinks the lock pin 61 toward the unlock position downward against the biasing force of the spring member.

The lock pin 61 is normally maintained at the lock position by the biasing force of the spring member, but is configured to be retracted to the unlock position against the biasing force of the spring member when the link 60b is pulled by each operation cable. Here, the other end side of the operation cable for manual operation extends to the rotation operation portion 200 provided on the base 11 side. As will be described later, the operation cable 206 (see fig. 11) is pulled by the operation of the rotational operation unit 200, and the restraint of the rotational lock mechanism 60 is released.

On the other hand, the power source for pulling the operation cable for the electric operation also serves as the motor 41 of the rotation mechanism 40, for example. That is, the motor 41 includes a clutch, and is configured to be switchable between an operation of rotating the seat by the rotating mechanism 40 and an operation of retracting the lock pin 61 to release the lock by switching the clutch. Since the structure of the clutch of the motor 41 is a general structure, detailed description thereof is omitted.

In the rotation lock mechanism 60 of the present embodiment, when the seat 1 is in the extended state, the restraint by the rotation lock mechanism 60 cannot be released by the manual operation of the rotation operation unit 200, and the release can be released only by the electric operation by the motor 41. Here, the electric operation is performed by a crew member of the vehicle or a station worker, and the manual operation is mainly performed by a passenger.

< rotating operation part 200 >

The rotation lock mechanism 60 is provided with a rotation operation portion 200, and the rotation operation portion 200 performs a releasing operation based on the restraint of the lock pin 61. As shown in fig. 1, the rotary operation unit 200 is assembled and unitized in one housing 201, and is fixed to a mounting portion 22 (see fig. 6) that hangs down toward the front end side of the moving stage 20.

As shown in fig. 1 (a), 2 (a), 11, and 12, the rotation operation unit 200 includes a foot pedal 204, and the foot pedal 204 is swingably supported via a pivot 203 to a lower end of a support bracket 202 fixed to the front surface side of the housing 201. The foot pedal 204 is swingable forward and backward about a pivot shaft 203 pivotally supporting the base end side thereof, and the tip end side thereof. The foot pedal 204 corresponds to a "pedal" of the present invention.

The footrest 204 swings to a use position (see fig. 11) where the front end side protrudes forward of the housing 201 and a storage position (see fig. 12) where the front end side is drawn upward. The pedal 204 is normally biased via a spring member 205 to a use position projecting forward. Here, when the foot pedal 204 is in the use position, the operation of releasing the restraint by the rotation lock mechanism 60 can be performed by depressing the foot pedal 204, but when the foot pedal 204 is in the storage position, the operation of releasing the restraint by the rotation lock mechanism 60 cannot be performed. The spring member 205 corresponds to the "urging member" of the present invention.

The other end of the manual operation cable 206 extending to the rotation lock mechanism 60 is connected to the base end of the foot pedal 204 via a connector. Here, when the foot pedal 204 located at the use position is depressed downward, the operation cable 206 is pulled, the lock pin 61 (see fig. 13) is retracted downward, and the locked state of the rotation lock mechanism 60 is released.

Further, a pin-shaped engaged portion 207 protruding in both side directions is fixed to a base end side of the pedal 204 at a position eccentric from the pivot shaft 203. The other end side of the tilt lock cable 115 extending from the tilt operation lock mechanism 110 side is connected to the engaged portion 207 via a connector. Here, when the engaged portion 207 is engaged with an engaging portion 211 described below, the tilt lock cable 115 is pulled, and the lock pin 113 of the tilt operation lock mechanism 110 protrudes upward, so that the tilt operation portion 100 is restrained from being operated.

< rotation operation preventing mechanism 210 >

The rotational operation unit 200 is provided with a rotational operation prevention mechanism 210, and the rotational operation prevention mechanism 210 cannot perform a releasing operation by the restriction of the rotational operation unit 200. When the seat 1 is in the extended state, the rotation operation preventing mechanism 210 cannot perform the operation of the foot pedal 204. The extended state here corresponds to "a specific state in which the seat 1 is rotated by one angle" in the present invention.

As shown in fig. 11 and 12, the rotation operation preventing mechanism 210 includes an engaging portion 211 provided on the base 11, which is the fixed side of the seat 1, and an engaged portion 207 provided on the rotation operation portion 200, which is the movable side of the seat 1. The engaging portion 211 is disposed at the front end of the lower surface side of the base 11, and is formed in a bracket shape protruding obliquely upward toward the front.

As described above, the engaged portion 207 is provided at a position eccentric from the pivot shaft 203 on the proximal end side of the pedal 204 in a pin shape. The engaged portion 207 is set to be properly engaged with the engaging portion 211 when the seat 1 is in the extended state (specific state). When the engaged portion 207 is engaged with the engaging portion 211, the pedal 204 is swung to the storage position against the urging force of the spring member 205, and thus the releasing operation in the rotation operation portion 200 cannot be performed. At the same time, the tilt operation portion 100 is restrained from being operated.

< action of the seat device 10 >

Hereinafter, an operation of changing the state of the seat 1 will be described with reference to fig. 15. First, as shown in fig. 15 a, when the base frame 30 (seat 1) is in the extended state, the rotary shaft (rotary mechanism 40) of the base frame 30 moves backward (approaches) toward the wall a side. Here, the long side (seat back side) of the bottom frame 30 is substantially parallel to the wall a, and the rotation angle is 0 °.

< restriction of rotational operation of seat 1 >

When the seat 1 is in the extended state, the base frame 30 is restrained from rotating relative to the moving stage 20 by rotating the lock mechanism 60. That is, as shown in fig. 6, the lock pin 61 of the rotation lock mechanism 60 is fitted into the locking hole 62a located on one long side of the base frame 30. Here, since the lock pin 61 protrudes from the base 11, which is the fixed side of the seat 1, the seat 1 is not only unable to rotate but also restrained from advancing and retreating.

As shown in fig. 2, when the seat 1 is in the extended state, the releasing operation in the rotational operation portion 200 is disabled by the rotational operation preventing mechanism 210. That is, in the extended state, the movable stage 20 moves back (approaches) toward the wall a, and the front end side of the movable stage 20 overlaps the front end side of the base 11. According to this positional relationship, as shown in fig. 2 (c), the engaged portion 207 of the pedal 204 located on the mobile station 20 is engaged with the engaging portion 211 located on the base 11. Then, the pedal 204 swings to the upright storage position against the urging force of the spring member 205, and is restrained at the storage position.

Thus, when the seat 1 is in the extended state, the footrest 204 is not only simply displaced to the storage position where it cannot be operated, but also firmly held in the storage position by the engagement relationship between the engagement portion 211 and the engaged portion 207. Therefore, in the extended state, the releasing operation in the rotational operation section 200 cannot be performed. With such a simple structure, the occupant can be reliably prevented from performing the rotation operation of the seat 1 in the extended state.

< restraint of tilting operation of backrest 3 >

In addition, when the seat 1 is in the extended state, the reclining operation in the reclining operation portion 100 is disabled by the reclining operation lock mechanism 110. Specifically, when the step plate 204 swings upward due to the engagement of the engaged portion 207 and the engaging portion 211, the tilt lock cable 115 connected to the engaged portion 207 is pulled, and the tilt operation portion 100 is restrained so as not to be operable.

That is, as shown in fig. 10, when the tilt lock cable 115 is pulled, the link 112 swings counterclockwise about the pivot 111 in fig. 10 against the urging force of the spring member 114. Then, the lock pin 113 located on one end side of the link 112 protrudes upward and is fitted into the lock hole 105a located in the receiving member 105, and the receiving member 105 is integrated with the operating lever 104 located at the initial position.

Thus, when the seat 1 is in the extended state, the reclining operation by the reclining operation portion 100 is disabled, and the backrest 3 cannot be tilted by the reclining mechanism 50. With such a simple structure, the reclining operation of the backrest 3 by the occupant can be reliably prevented in the extended state, and the backrest 3 can be prevented from unintentionally falling down and interfering with the wall a.

< transformation from extended state to crossed state >

As shown in fig. 15 a to 15 c, in order to change the base frame 30 (seat 1) from the extended state to the cross state (rotation angle of 90 °), first, restraint by rotation of the rotation lock mechanism 60 needs to be released. Here, the operation of disengaging the lock pin 61 from the locking hole 62a cannot be performed by the operation of the foot pedal 204 as described above, but is performed by an electric operation using the power of the motor 41.

In the extended state shown in fig. 15 (a), after the restraint by the rotation lock mechanism 60 is released, as shown in fig. 15 (b), when the base frame 30 is rotated in the forward direction (counterclockwise in fig. 15) by the motor 41, the base frame 30 is rotated while being advanced by the interlocking mechanism. That is, the bottom frame 30 rotates while moving forward toward the tunnel side while rotating in the forward direction so as not to interfere with the wall a.

As shown in fig. 15 c, when the base frame 30 reaches the cross state (rotation angle of 90 °), the lock pins 61 of the rotation lock mechanism 60 are fitted into the locking holes 62b located on one short side of the base frame 30 in fig. 6. Thereby, the bottom frame 30 (seat 1) is restrained so as not to be rotatable in the cross state.

< restraint release of rotational operation of seat 1 >

When the seat 1 is in the crossed state, the restraint of the rotation operation portion 200 by the rotation operation preventing mechanism 210 is released. That is, in the intersecting state shown in fig. 15 (c), the mobile station 20 is most advanced (separated) with respect to the wall a side, and the front end side of the mobile station 20 is arranged to be separated forward from the front end side of the base 11. In this positional relationship, as shown in fig. 11, the engaged portion 207 of the pedal 204 located on the mobile station 20 is not engaged with but separated from the engaging portion 211 located on the base 11. Therefore, the pedal 204 is positioned at the use position protruding forward by the urging force of the spring member 205.

At this time, the occupant of the seat 1 can release the restraint by the rotation lock mechanism 60 by stepping on the foot pedal 204. That is, in fig. 11, when the foot pedal 204 is stepped on and swung, the operation cable 206 is pulled, the lock pin 61 (see fig. 13) is retracted downward, and the locked state of the rotation lock mechanism 60 is released. Thus, the seated person can rotate the seat 1 manually.

< restraint release of reclining operation of backrest 3 >

When the seat 1 is in the crossed state, the restraint of the reclining operation portion 100 by the reclining operation lock mechanism 110 that cannot be operated is also released. That is, as described above, in the intersecting state, as shown in fig. 11, the engaged portion 207 of the pedal 204 located on the mobile station 20 is not engaged with but separated from the engaging portion 211 located on the base 11. Therefore, the pedal 204 is in the use position protruding forward by the biasing force of the spring member 205, and the tilt lock cable 115 is in an unstretched state.

As a result, in the reclining lock mechanism 110, the link 112 is in a state in which the lock pin 113 does not protrude upward due to the biasing force of the spring member 114, as shown in fig. 9. Therefore, the lock pin 113 is not pulled out from the lock hole 105a of the receiving member 105 integrated with the operation lever 104, and the restriction of the operation lever 104 that is not operable is released, and the tilting operation is enabled. Therefore, the seated person can tilt the backrest 3 at an arbitrary angle by the reclining mechanism 50, and the sitting feeling can be improved.

< conversion from-cross state to inverse cross state >

In the cross state shown in fig. 15 c, when the base frame 30 is rotated in the reverse direction (clockwise direction in fig. 15) after the restraint of the rotation lock mechanism 60 is released, the base frame 30 moves backward or forward while rotating, for example, by an interlocking mechanism not shown. Next, as shown in fig. 15 (d), the base frame 30 is not moved forward and backward but rotated in the reverse direction in a state of being temporarily held at a position where it is moved forward in a state of being parallel to the extended state.

As shown in fig. 15 (e), when the base frame 30 reaches the reverse crossing state (rotation angle-90 °), the lock pin 61 of the rotation lock mechanism 60 is fitted into the other short-side lock hole 62c of the base frame 30, and the base frame 30 is once again restrained so as not to be rotatable. The change from the negative crossing state to the negative crossing state of the seat 1 is not limited to the manual operation, and may be performed by the electric operation. In addition, in order to return the seat 1 from the reverse crossing state to the crossing state and from the crossing state to the original extended state, the operations may be reversed to the conversion from the extended state to the crossing state and from the crossing state to the reverse crossing state.

< Structure and Effect of the present invention >

The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. The present invention derived from the above-described embodiments will be described below.

< Structure and Effect of the present invention >

First, the present invention is a seat device 10 capable of changing the state of a seat 1, characterized in that,

the seat 1 includes:

a rotation lock mechanism 60 that is rotatable about a rotation axis and can restrain the seat 1 at a plurality of rotation angles;

a rotation operation unit 200 that performs a releasing operation based on the restraint of the rotation lock mechanism 60; and

the rotation operation preventing mechanism 210 is configured to be incapable of performing the releasing operation of the rotation operation part 200 when the seat 1 is in a specific state of a rotation angle,

the rotation operation preventing mechanism 210 includes:

an engaging portion 211 provided on the fixed side of the seat 1; and

and an engaged portion 207 provided on the movable side of the seat 1 in the swiveling operation unit 200, and engaged with the engaging portion 211 when the seat 1 is in the specific state, so that the releasing operation of the swiveling operation unit 200 is disabled.

In the present seat device 10, when the seat 1 is in the extended state which is a specific state, the seat back surface approaches the wall a, but the rotation of the seat 1 cannot be performed by the seated person so that the occupant does not change the position at will. Here, the rotation of the seat 1 requires the rotation operation unit 200 to release the restraint by the rotation lock mechanism 60. Therefore, the rotation operation preventing mechanism 210 disables the operation of the rotation operation unit 200, and the seat 1 is disabled from rotating.

In the rotational operation preventing mechanism 210, when the seat 1 is in the extended state, the engaged portion 207 located on the movable side of the seat 1 in the rotational operation portion 200 is engaged with the engaging portion 211 located on the fixed side of the seat 1, and thus the releasing operation of the rotational operation portion 200 cannot be performed. According to the mechanical engagement relationship between the engaging portion 211 and the engaged portion 207, it is not necessary to use an electromotive force with a simple structure, and the seat 1 cannot be rotated by the occupant only when the seat 1 is in the extended state.

In addition, the present invention is characterized in that,

the rotary operation part 200 can be displaced to a use position where the operation can be released and a storage position where the operation cannot be released,

when the seat 1 is in the specific state, the rotation operation preventing mechanism 210 is configured to displace the rotation operation portion 200 from the normal use position to the storage position and to be restrained at the storage position by engaging the engaged portion 207 with the engaging portion 211.

As described above, in the seat device 10, when the seat 1 is in the extended state which is the specific state, the engaged portion 207 is engaged with the engaging portion 211, and the rotational operation portion 200 is displaced from the normal use position to the retracted position. Therefore, the operation of the rotation operation portion 200 itself cannot be performed by the seated person, and the rotation of the seat 1 can be restricted so as to be easily understood by the seated person.

The rotation operation portion 200 is not simply displaced to the storage position, but is restrained from being displaced from the storage position by the engagement relationship between the engagement portion 211 and the engaged portion 207. Therefore, it is possible to reliably prevent the erroneous operation of the seated person to return the rotary operation unit 200 to the use position by mistake.

Further, the present invention is characterized by comprising:

a rotation mechanism 40 that rotates the seat 1 about a rotation axis; and

a slide mechanism 14 for advancing and retracting the seat 1 from the fixed side together with the rotation mechanism 40,

by the interlocking of the rotation mechanism 40 and the slide mechanism 14, the state of the seat 1 can be changed to the following state:

an extended state in which the seat back surface is substantially parallel along the wall a;

in a crossing state separated from the wall A in a direction substantially perpendicular to the extended state,

the specific state of the seat 1 corresponds to the extended state.

Thus, as described in the above embodiment, the present seat device 10 can be applied to a general swivel seat mounted on a railway vehicle as it is.

Further, the present invention is characterized by comprising:

a base 11 fixed to a floor surface as a fixed side of the seat 1; and

a moving table 20 which is a movable side of the seat 1, is supported by the base 11 so as to be able to advance and retreat through the slide mechanism 14, and rotatably supports the seat 1 through the rotating mechanism 40,

the engaging portion 211 is provided on the base 11,

the rotation operating unit 200 and the engaged unit 207 are provided in the mobile station 20.

As described above, in the seat device 10, the engagement portion 211 and the engaged portion 207 of the rotation operation preventing mechanism 210 can be arranged as the most suitable components among the minimum components required for the seat device 10.

Further, the present invention is characterized in that,

the rotation operating unit 200 includes a pedal 204, and the pedal 204 is swingably supported at the use position protruding forward and the storage position rising upward on one end side of the movable stage 20 with the base end side as a rotation center,

the engaged portion 207 is provided at a position eccentric from the rotation center of the pedal 204,

the pedal 204 is normally maintained at the use position by the biasing member 205, and when the engaged portion 207 is engaged with the engaging portion 211, the pedal swings to the storage position against the biasing force of the biasing member 205 and is restrained at the storage position.

As described above, in the seat device 10, the rotation operation portion 200, the engagement portion 211 of the rotation operation preventing mechanism 210, and the engaged portion 207 can be easily realized with a simple configuration among the minimum necessary components of the seat device 10.

While the embodiments have been described above with reference to the drawings, the specific configurations are not limited to these embodiments, and modifications and additions within the scope not departing from the gist of the present invention are included in the present invention.

For example, the shapes of the base 11, the mobile station 20, and the base frame 30 are not limited to the illustrated shapes. Further, the seat 1 has been described as an example of two-person seats, but the seat 1 may be a three-person seat or one-person seat. The change of the state of the seat is not limited to the extended state, the cross state, and the inverted cross state.

Industrial applicability of the invention

The present invention can be widely used as a seat device for a chair for theaters, homes, and business use, in addition to the seat 1 for a vehicle installed in a passenger compartment such as a railway vehicle, an aircraft, an automobile, and a ship.

Description of the symbols

10-seat device, 11-base, 14-slide mechanism, 20-moving stage, 30-base frame, 40-rotation mechanism, 50-tilt mechanism, 60-rotation locking mechanism, 100-tilt operation part, 104-operating lever, 105-receiving part, 110-tilt operation locking mechanism, 113-locking pin, 200-rotation operation part, 204-pedal, 207-engaged part, 210-rotation operation preventing mechanism, 211-engaging part.

Claims

1. A seat device (10) capable of changing the state of a seat (1),

a seat (1) is rotatable about a rotation axis, and is provided with:

a rotation lock mechanism (60) which can restrain the seat (1) at a plurality of rotation angles;

a rotation operation unit (200) that performs a releasing operation based on the restraint of the rotation lock mechanism (60); and

a rotation operation preventing mechanism (210) which can not perform the releasing operation in the rotation operation part (200) when the seat (1) is in a specific state of a rotation angle,

the rotation operation preventing mechanism (210) includes:

an engaging section (211) provided on the fixed side of the seat (1); and

and an engaged section (207) which is provided on the movable side of the seat (1) in the rotation operation section (200) and which engages with the engagement section (211) when the seat (1) is in the specific state, thereby disabling the release operation in the rotation operation section (200).

2. The seating arrangement (10) of claim 1,

the rotary operation part (200) can be displaced to a use position where the operation can be released and a storage position where the operation cannot be released,

when the seat (1) is in the specific state, the rotation operation preventing mechanism (210) causes the rotation operation portion (200) to be displaced from the normal use position to the storage position and is restrained at the storage position by engaging the engaged portion (207) with the engaging portion (211).

3. The seat device (10) according to claim 1 or 2, characterized by comprising:

a rotation mechanism (40) that rotates the seat (1) about a rotation axis; and

a slide mechanism (14) for advancing and retreating the seat (1) from the fixed side together with the rotation mechanism (40),

the state of the seat (1) can be changed to an extended state in which the seat back surface is substantially parallel to the wall (A) and a crossed state in which the seat back surface is separated from the wall (A) in a direction substantially perpendicular to the extended state by the interlocking of the rotating mechanism (40) and the slide mechanism (14),

the specific state of the seat (1) corresponds to the extended state.

4. The seat device (10) according to claim 3, characterized by comprising:

a base (11) which is a fixed side of the seat (1) and is fixed to a floor surface; and

a moving table (20) which is a movable side of the seat (1), is supported by the base (11) so as to be able to advance and retreat via the slide mechanism (14), and rotatably supports the seat (1) via the rotating mechanism (40),

the engaging part (211) is provided on the base (11),

the rotation operation unit (200) and the engaged unit (207) are provided on the mobile station (20).

5. The seating arrangement (10) of claim 4,

the rotation operation part (200) is provided with a pedal (204), the pedal (204) is supported at one end side of the mobile station (20) by taking a base end side as a rotation center in a swinging way at the use position protruding forwards and the storage position standing upwards,

the engaged portion (207) is provided at a position eccentric from the rotation center of the pedal (204),

the pedal (204) is normally maintained at the use position by a biasing member (205), and when the engaged portion (207) is engaged with the engaging portion (211), the pedal swings to the storage position against the biasing force of the biasing member (205) and is restrained at the storage position.